Marie and Michelle are escaping from a lunatic asylum. Michelle is a tough girl who knows how to survive on the road, but the extremely shy Marie desperately clings to her.

When the boss' unlucky daughter is missing in South America, Campana is sent to watch the boss' most unlucky employee who is sent as a private detective in hopes he can duplicate the daughter's mistakes.

A serial-killer frightens Paris by phoning young ladies at night, telling them insults about their lives. Minos, as he calls himself, wants to prevent the world from free women and he targets at first these ones. Commissaire Letellier is given the investigation and he has hard work with the maniac.

Tony and Nanar, two teenagers who met in reform school, are part of a gang of idle, penniless youngsters from the Paris suburbs. Together, they go to dances and plan mischief. The muse of the gang, B.B. La Brune, organizes leisure activities when she's not up to no good. Unemployed and penniless, they all dream of consumption and possession. Until the day a fight turns ugly: Tony, trying to reason with Nanar, pulls the trigger.

An important drug lord settled in Marseille is suspected of having ordered the killing of an American agent, but it is impossible to impute him due to his political influences, so the dead agent's boss decides to hire the services of a hitman to kill him.

Complications abound in this French film, which tells the story of a filmmaker who is attempting to put his real life into a movie; his interactions with the people in the movie he is filming create reverberations in his "real" life, although the past remains unchanged. Among the complications is his growing regard for the woman who plays his cinematic wife. She may wind up replacing his actual wife in real life. One of the highlights of this film is the insight it gives into the actual mechanics of filmmaking.